Okay, I picked this up at Susan Polgar's blog where it received a lot of responses. There wasn't any claim of authorship so the best I can do is to cite the source. Maybe, one day, you'd find this very study in the galaxy of chess endgame studies.

Anyway, white to move and ? What do you think? He's got two extra pawns. The queening square of the B pawn is the same color as the bishop. Can you convert this into a win?

I tried it out and it has been quite a brain-teaser!